11. The percentage of recovery in BG method.
12. The walls by which roof over the goaf partially/compleated supported by
13. Bentonite chemical is used for
14. Driving motor HP in thrower conveyar in mechanical stowing.
15. The distance between one room to another room, leaving a small rib in . . . . . . . . meters in room and pillar mining.
16. Crows foot used for removing
17. If the size of the pillar is 30 m × 30 m; the number of stooks done in pillar is
18. Rotory drilling methods are
19. For a seam inclined, 60° steep, 2 m thin the method of goaf control employed.
20. The length of rooms in room and pillar method.
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